Surface-heater.



PATENTED MAY 10, 1904.

W. G. KING. SURFACE HEATER. APPLICATION FILED JULY 24, 1901.

2 SHEBTS-SHEET 1.

N0 MODEL.

3 m 1m wfoz 1 9 1" cones No. 759,531. PATENTED MAY 10, 1904. W. G. KING.

SURFAGE HEATER.

APPLICATION FILED JULY 24, 1901. No MODEL. 2 SHEETS-SHEET 2.

wuzwroz WALTER GRANT KING, OF BUFFALO,

Patented May 10, 1904.

PATENT OFFICE.

NEW YORK, ASSIGN OR TO IROQUOIS 'lRON TVORKS, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

HEATER.

SPECIFICATION forming part of Letters Patent No. 7 59,531 dated May 10, 1904.

Application filed July 24, 1901. Serial No. 69,550. (No model.)

To utZZ whom, it may concern:

Be it known that 1, WALTER GRANT KING, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Surface-Heaters, of which the following is a specification.

My invention relates to that class of apparatus employed for heating the surface of as- IO phalt pavements to facilitate repairs thereof; and it consists in means for mixing together air and a combustible fluid and projecting the same in ignited streams upon the pavement, as fully set forth hereinafter and as illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of an apparatus embodying my improvements. Fig. 2 is a plan view of part of the apparatus, and Fig. 3 a sectional view of one of the mixing-tubes and nozzles; Fig. 4, a longitudinal section through the hood.

The frame A is of any suitable character. Preferably, as shown, it consists of iron rods or pipes suitably connected to constitute a light support for the other parts and itself supported upon wheels 1 Upon the frame is supported a receptacle B for the liquid fuel or combustible fluid which is to be used in the heater, preferably kerosene or gasolene, and in order that this material may be forcibly ejected through the nozzles, hereinafter described, means are employed for forcing it toward said nozzles. These means may be a pump or any other means for compressing air above the fluid in the receptacle B.

.The pavement is heated by a series of flames from the burning of a combustible mixture projected in streams onto the pavement, preferably nearly parallel thereto, but so as to 4 strike the surface. To this end I make use of a series of mixing-tubes 1 l 1, suitably supported by the frame in position to project the mixture toward the pavement, and opposite each mixing-tube, which has an opening 4: to permit the entrance of air, is a nozzle 2, through which the fluid is projected. The tubes 1 l l are approximatelyhorizontal, but with the nozzles are so arranged that the flame is not projected into the hood above the pavement, but downward and upon the pavement, 5 so as to flow horizontally along the surface thereof and act directly upon the pavement instead of acting to maintain a heated body of gas in the hood, as heretofore. The fluid may be vaporized before being passed through the nozzles or it may be forced from the nozzles in the form of a line spray, which, mixing with the air, forms a mixture which will burn in the form of a series of parallel jets projected from themixingtubes onto the pave- 6O ment.

In the construction shown there is vaporizer whereby the liquid fuel is vaporized by the action of the flames from the mixing tubes. As shown, the nozzles all communi- 5 cate with a pipe 3, which is supplied by side pipes so arranged as to be heated by the flames, and to the side pipes extends a pipe 6 from the receptacle B, suitable cocks being arranged to control the flow.

It is desirable to confine the flame as much as possible to the place where the pavement is to be heated and to prevent it from being blown away from the pavement or to one side with danger to passers-by and other objects, and therefore I prefer in most instances to extend a hood 5 over that portion of the pavement toward which the mixture is projected.

It will be seen, therefore, that the hood is not depended upon to hold a body of heated gases in contact with the pavement, but simply as a guard to prevent the flame which is projected onto the pavement from being deflected.

I have shown the mixing-tubes all as ar ranged at one end of the hood 5, which end. 5 is closed and perforated for the passage of the mixing-tubes; but, if desired, these tubes may be arranged on opposite sides or on all four sides of the hood or frame, if a hood is not employed.

l Vithout limiting myself to the precise con struction and arrangement of parts shown, I claim The combination in a surface-heater, of a plurality of mixing-tubes, a frame supporting the same, a plurality of nozzles arranged opposite the open ends of said tubes, the tubes and nozzles inclined to project the flame upon and along the face of the pavement, a hood In testimony whereoflhave signedmy name arranged above the point Where the mixture to this specification in the presence of tWo subis projected, and a supply-pipe extending scribing Witnesses.

along the sides of the hood and commumcat- WVALTER GRANT KING. ing with the nozzles and means for forcing Witnesses: liquid fuel to the supply-pipe, substantially EDWARD D. HO0KER,

as set forth. O. V. PEASE: 

